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xen: suspend: refactor cancellation flag into a structure

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Will add extra fields in subsequent patches.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Ian Campbell 2011-02-17 11:04:20 +00:00 committed by Stefano Stabellini
parent bd1c0ad284
commit ceb1802947
1 changed files with 19 additions and 13 deletions
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32
drivers/xen/manage.c
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@ -34,11 +34,15 @@ enum shutdown_state {
/* Ignore multiple shutdown requests. */
static enum shutdown_state shutting_down = SHUTDOWN_INVALID;
struct suspend_info {
int cancelled;
};
#ifdef CONFIG_PM_SLEEP
static int xen_hvm_suspend(void *data)
{
struct suspend_info *si = data;
int err;
int *cancelled = data;
BUG_ON(!irqs_disabled());
@ -54,12 +58,12 @@ static int xen_hvm_suspend(void *data)
* or the domain was merely checkpointed, and 0 if it
* is resuming in a new domain.
*/
*cancelled = HYPERVISOR_suspend(0UL);
si->cancelled = HYPERVISOR_suspend(0UL);
xen_hvm_post_suspend(*cancelled);
xen_hvm_post_suspend(si->cancelled);
gnttab_resume();
if (!*cancelled) {
if (!si->cancelled) {
xen_irq_resume();
xen_console_resume();
xen_timer_resume();
@ -72,8 +76,8 @@ static int xen_hvm_suspend(void *data)
static int xen_suspend(void *data)
{
struct suspend_info *si = data;
int err;
int *cancelled = data;
BUG_ON(!irqs_disabled());
@ -93,13 +97,13 @@ static int xen_suspend(void *data)
* or the domain was merely checkpointed, and 0 if it
* is resuming in a new domain.
*/
*cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
si->cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
xen_post_suspend(*cancelled);
xen_post_suspend(si->cancelled);
gnttab_resume();
xen_mm_unpin_all();
if (!*cancelled) {
if (!si->cancelled) {
xen_irq_resume();
xen_console_resume();
xen_timer_resume();
@ -113,7 +117,7 @@ static int xen_suspend(void *data)
static void do_suspend(void)
{
int err;
int cancelled = 1;
struct suspend_info si;
shutting_down = SHUTDOWN_SUSPEND;
@ -143,20 +147,22 @@ static void do_suspend(void)
goto out_resume;
}
si.cancelled = 1;
if (xen_hvm_domain())
err = stop_machine(xen_hvm_suspend, &cancelled, cpumask_of(0));
err = stop_machine(xen_hvm_suspend, &si, cpumask_of(0));
else
err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));
err = stop_machine(xen_suspend, &si, cpumask_of(0));
dpm_resume_noirq(PMSG_RESUME);
if (err) {
printk(KERN_ERR "failed to start xen_suspend: %d\n", err);
cancelled = 1;
si.cancelled = 1;
}
out_resume:
if (!cancelled) {
if (!si.cancelled) {
xen_arch_resume();
xs_resume();
} else